ST-828 NiCd / NiMH / Li-Ion Battery Seq. Twin Charge Control IC

Transcription

1 NiCd / NiMH / Li-Ion Battery Seq. Twin Charge Control IC Available Now!!! Main Function For NiCd / NiMH battery apply constant-current (C.C.) charge technique and provide - V/ t, Timer, V-Max, terminatecondition detection Apply trickle charge current after battery was full-charged. For Li-Ion battery apply constant-voltage (C.V.) charge technique to ensure safety and prevent battery from damage. Provide battery chemistry type input selection, allow system to identify battery type via proper interface circuit. Support LED/LCD display. Provide battery power indicator (LCD mode) to illustrate the battery power in percentage. Support battery discharge function. 16 Pin SOP Package General Description has the most simplest and economic way by using the LM339 associate with advance software program to achieve the goal of constant-current and constant-voltagecontrol. Especially suitable for the up-to-date Li-Ion battery charge control and MiMH/NiCd battery are also available. for the phone-set which built-in charge-control function itself, provide a simplest solution to detect the charge status of phone-set. Basically, the phone-set will has higher priority to charge than the battery if both in their own slot. System will monitor the charging status of phone-set and detect the "charge-terminate" situation of phone-set and then transfer the charge process to the battery. support LED/LCD indicators could illustrate the condition during charging (Red-LED for Rapid-Charge, Green-LED for Full-Charged in LED display mode, and 25%, 50%, 75%, 100% for charging power indicator in LCD display mode). is the best cost performance IC to achieve the goal of higher quality and lower the cost of twin charger solution. Display Reference LCD Display PH POWERLOGO 25% 50% 75% 100% LED Display R /AFAST G /AFULL R /BFAST G /BFULL All information may subject to change without notice, Contact us for latest Information!!! March 13, 2000 (C) 1999 Chips Garden Enterprise Co., Ltd. Page 1 of 2

2 XO/R XI DISCB BATB INUSE CHA DISP CTRL Pin out Pin Pin Descriptions Mult Func 1 16 SOP CVB VDD VSS AFAST AFULL BFAST BFULL 1 XO/R I/O RC oscillation output terminal. 2 XI I RC oscillation input terminal. 3 /DISCB I/O Battery discharge input/output terminal. YES 4 BATB I Bat. Voltage detection terminal. 5 /INUSE I Phone-set Insert/Remove detection terminal 6 CHA O Phone-set charge control output terminal. YES 7 DISP I/O LED / LCD display selection input terminal. YES 8 CTRL O A/D conversion control output terminal. 9 /BFULL I/O Full charged indicator output terminal-b. YES 10 /BFAST I/O Fast charge indicator output terminal-b. YES 11 /AFULL I/O Fast charge indicator output terminal-a. YES 12 /AFAST I/O Full charged indicator output terminal-a. YES 13 O Battery charge control output terminal. YES 14 VSS I MCU ystem ground. 15 VDD I MCU power supply input terminal. 16 /CVB I/O Constant-Voltage control output terminal YES Note : Descriptions marked with "Mult func" indicate a multi-function on it and is has variant functions were provided in these pins. For the other pin functions and descriptions please refer to detail explanations. Charge Terminate Conditions: V_Min : 0.8V/Cell(NiMH), 2.4V/Cell(Li-Ion) Timer : 6 Hours V-Max : 1.8 V/Cell (NiCd / NiMH) Discharge level : 1.0V/Cell (NiMH) V-Cut : 4.2 V/Cell (Li-Ion) : 3.6V/Cell (Li-Ion) 4.1 V/Cell (NOKIA ) VDD : 5.0V1% - V/ t : -8mV~ -16mV / Cell 3.3V1% Recommended LCD Specification : Driving Voltage : 4.5V (@VDD=5V) 2.8V (@VDD=3.3V) Multiplex Level : Static Frame Frequency : 64Hz View Angle : 6 O'clock View Mode : Positive Reflective All information may subject to change without notice, Contact us for latest Information!!! March 13, 2000 (C) 1999 Chips Garden Enterprise Co., Ltd. Page 2 of 2

3 Pin 1 XO/RRC Oscillation output terminal. Pin 2 XIRC Oscillation input terminal. 53.6K XO/R XI Pin 3 (1) /DISCBBattery discharge input/output terminal. Once battery was inserted, signal a LOW condition on this pin will cause system transfer to discharge mode. (Discharge with active-low). When Pin 3 become low level state (Low-active) with battery in slot. System will enter discharge mode to discharge battery. EDV (End of Discharge Voltage) was 1.0V/Cell for NiMH battery, 3.6V/Cell for Li-Ion Battery. DISCB R63 DISCB R63 CVB 470K Discharge NiMH Battery only! Discharge NiMH / Li-Ion battery. (2) DATADS2502/DS2434 EP battery identification chip input terminal. Once battery was inserted, system will auto to access the identification chips via this pin, also to identify the chemistry type of battery. (eg. MOTOROLA, AEG,...) Pin 4 BATBBattery voltage detection input terminal. Since the A/D voltage input range from 0~VAref(=VDD), the input voltage can't exceed the range of VDD. Therefore, the actual voltage should be attenuated with a resister network in order to limit it in the range of 0 ~ 5V. The system calculate the voltage of battery base on 2.5 cells. Hence, the formula as following : [ (Number of Cell*2.0-)/ = R46/R47 ] B+ BATB VSS 47K A/D CTRL Input 101P 47K R46 (1%) D10 R47 (1%) R32 (1%) D12 Battery B- To /CVB (C) 1999 Chips Garden Enterprise Co., Ltd. Page 1 of 7

4 R46/R47 (1%) Battery (NiMH+Li-Ion) 5.0V 3.3V External control circuit D10,D12,R32 External NiMH/Li-Ion identify circuit 3 Cells 4.1V (Li-Ion) 3.43K/20K 2.55K/3.3K X Yes (NiMH) 4.2V (Li-Ion) 4K/20K 2.7K/3.3K X Yes 4 Cells NiMH Only 12K/20K 4.7K/3.3K X X 4 Cells + 8.2V Li-Ion 26.7K/20K D10, D12, R32=20K Yes 5 Cells NiMH Only 20K/20K 6.7K/3.3K X X 5 Cells 8.2V (Li-Ion) 26.7K/20K D10, D12, R32=68K Yes (NiMH) 8.4V (Li-Ion) 28K/20K D10, D12, R32=68K Yes 6 Cells NiMH Only 28K/20K X X Pin 5 (1) /INUSE : Phone-set insert/remove detection terminal. /INUSE should be in Low-level state while the phone-set was inserted to the slot. A High-level signal on /INUSE pin indicate the phone-set was remove from the slot. PH A+ INUSE R24 (PULSE) Charge Control Circuitry R30 R29 R25 R27 R28 R21 47K I 1N5819 A- R Full-Charged current should be fine tuned, Since the end-of-charge current between different models of phone-set was not all the same. Power consumption between different models of phone-set was not all the same when it nearly full-charged. Phone-Set Insert/Remove Current Detection Setting (IINUSE) I INUSE =( R25 ) (R21 + R22) R24+R25 Phone-Set Fast Charge Current Detection Setting (I PULSE) I PULSE =( R28 R28+R29 ) R22 Pin 6 CHAPhone-Set charge control output terminal CHA was in High-level state, indicate the charge process to phone-set is in progress. While CHA was in Low-level state, indicate the charge process to phone-set was stopped. When CHA pin was not used, pull-up a 4.7KΩ resistor to was recommended. Pin 7 (1) DISP : LED/LCD display selection input terminal. (1) Pull-up a 4.7KΩ resistor to indicate the LED display mode was selected. In thi mode, Pin 9,10, 11, 12 was defined as /BFULL, /BFAST, /AFULL, /AFAST LED indicator output terminal. (2) When 4.7KΩ resistor was not connected indicate the LCD display mode was selected. In this mode, Pin 9, 10, 11,12 was defined as 25%, 50%, 75%, 100% battery power indicator output. (C) 1999 Chips Garden Enterprise Co., Ltd. Page 2 of 7

5 (2) APHONE : Phone-set charge indicator output terminal. In LCD display mode, Pin 7 was defined as phone-set charge indicator output. Since the 4.7KΩ was not connected; hence it can be connected to phone-set segment of LCD panel. Pin 8 CTRL : A/D conversion control output terminal. Pin 8 5.1K/1% To A/D Channel BATB (Mylar/X7R) Pin 9 (1) /BFULLBattery full-charged indicator output terminal. (LED mode) (2) B25%Battery charge 25% power indicator output terminal. (LCD mode) (3) OPTION1MCU option1 selection input terminal. Pin 10 (1) /BFASTBattery fast charge indicator output terminal. (LED mode) (2) B50%Battery charge 50% power indicator output terminal. (LCD mode) (3) OPTION2MCU option2 selection input terminal. Pin 11 (1) /AFULLPhone-set full-charged indicator output terminal. (LED mode) (2) B75%Battery charge 75% power indicator output terminal. (LCD mode) (3) OPTION3MCU option3 selection input terminal. Pin 12 (1) /AFASTPhone-set fast charge indicator output terminal. (LED mode) (2) B100%Battery charge 100% power indicator output terminal. (LCD mode) (3) OPTION4MCU option4 selection input terminal. Pin 13 (1) : Battery charge control output terminal. Pin 13 in high-level state indicate battery was in charge-on-duty. Fast Charge Trickle Charge Duty Cycle=90% Duty Cycle=10% (2) /PULSE : Phone-set charge signal detection terminal. By detecting the charge signal issued from phone-set, the system could identify the charging progress of phone-set and determine when the phone was full-charged, then the system could transfer to another mode in order to charge the battery in the rear-slot. In the time when the phone-set was charging, system still could identify the charging pattern to look for the intervals to charge battery if phone-set was in charge-off-duty state. (C) 1999 Chips Garden Enterprise Co., Ltd. Page 3 of 7

6 A+ 47K R1 LM K Phone A- (PULSE) 470K + 101P IRS VRS RS Battery Charge Control Circuit VFULL Since the different model of phone-sets draws different current when it reach the full-charged point. Users should adjust the set point (VFULL) in order to detect the status when phone-set was full-charged. Phone-set Full Charged Current : IRS=VRS/RS=VFULL/RS=*[R2/(R1+R2)]RS R2 VRS [Pulse Charging Control Phone-set] VRS [Current Charging Control Phone-set] VFULL Phone-set Full-Charged VFULL t Phone-set Full-Charged t (PULSE) (PULSE) (FIG.1) Charger detect Full-Charged t (Fig.2) Charger detect Full-Charged (1). /PULSE=Low indicate the phone was in fast-charge stage. (2). /PULSE=Hi/Low bouncing indicate the phone-set has been or nearly full-charged. System will analysis the charging pattern to determine the phone-set was in full-charged status or not (3). /PULSE=Hi and /INUSE=H indicate phone-set has been removed from slot. Caution : (1) only support the phone-set which built-in with charge control function itself if it charge the phone-set without charge control function will damage the phone-set. (2) Phone-set charge using pulse control charge technique, the VFULL current set point should be larger than the current draws on phone-set when phone-set was in charge-off- duty. t (C) 1999 Chips Garden Enterprise Co., Ltd. Page 4 of 7

7 (3) Phone-set charge using current charge control technique, the VFULL current set point should not br smaller than the current draws on phone-set when it was power-on. Pin 14 VSS : MCU system ground. (GND) Pin 15 VDD : MCU power supply input terminal. 1. The reference input plays a major roles in system A/D conversion. And the deviation will cause error of the system voltage set-point. For examples, the discharge voltage will be 5.0V/5Cells while the reference input is 5.0V. And the former (discharge voltage) will become 5.25V/5Cells while the later (reference input) raised to 5.25V (5% up). 2. In order to charge the Li-Ion battery, the system need a strict constant-voltage of 4.25V (Upper Limit). So we got to apply a 5.0V1% accurate voltage reference. The recommendation as follows: (1) Manually screen the 5.0V1% of LM7805 (2) Use a shut-regulator (eg. TL431) to form a voltage regulator circuit which produce a better accuracy like following : DC IN VDD R R1 10K/1% TL431/1% Vref=2.5V R2 10K1% VSS V O = V ref (1 + R1 R2 ) Pin 16 (1) /CVB : Constant voltage control output terminal. /CVB output will be in Hi-Z (High Impedance) state if NiMH/NiCd battery was charging. /CVB output will be in Low (High Impedance) state if Li-Ion battery was charging. Detail charging scheme was listed as follows: /CVB Chemistry Voltage Recommend /CVB Voltage Hi-Z Hi-Z NiCd/NiMH 2.0V / Cell 6.0V (3 Cells NiXX) Hi-Z Low Li-Ion 4.1V / Cell 4.2V / Cell 4.12V (1 Cell Li-Ion) 8.22V (2 Cells Li-Ion) 4.22V (1 Cell Li-Ion) 8.42V (2 Cells Li-Ion) Low Hi-Z/Low NiXX/Li-Ion None No Output (C) 1999 Chips Garden Enterprise Co., Ltd. Page 5 of 7

8 B+ R46 R47 B R44 BATB CVB R45 VR44 = VR45 while constant-voltage mode was activated, hence the formula as follow: R47 R45 V B+ ( )= ( R46+R47 R45 V B+ = ( ) R44+R45 R44+R45 ) (R46+R47 ) R47 R44, R45 Recommendation : While = 3.3V then (R44=2.4K, R45=5.7K While = 5.0V then (R44=8.87K, R45=21K (2) TYPE : Battery chemistry type selection input terminal. After the battery was inserted, MCU will select the charging mode according to the pin level on TYPE pin. If the pin level was in high-level (VDD) the MCU will recognize as NiMH/NiCd battery while low-level will recognize as Li-Ion battery. On some specified cellular phone battery like MOTOROLA series, the MCU was able to recognize the battery type recording in the chip of battery via proper interface. Since the phone-set must has some way to identify the NiMH/Li-Ion battery if both batteries were supported. Something like resistor (eg. NOKIA) or identify chip (eg. MOTOROLA). According to the way, through a proper interface, the battery chemistry type was much easy for MCU to recognize. Pin 16 = VDD (NiCd/NiMH Battery) while battery was inserted. Pin 16 = GND (Li-Ion Battery) while battery was inserted. TYPE (CVB) /CVB Circuitry Rs Size Proper adjust the Rs that the MCU could recognize the battery type, according to the Rth packing in the battery. R TH (R Li-IonR NiMH) TYPE (CVB) /CVB Circuitry Rs Proper adjust the Rs that the MCU could recognize the battery type, according to the Rth packing in the battery. Size (R Li-IonR NiMH ) R TH +5V +5V MOTOROLA Series 4.7K Data Battery MOTOROLS Series 4.7K Data Battery TYPEB (/CVB) 100 T D TYPEB (/CVB) 6.8Vz 100 T D DS2502/DS2434 DS2502/DS2434 (C) 1999 Chips Garden Enterprise Co., Ltd. Page 6 of 7

9 System Function Selection Descriptions: AFAST AFULL BFAST BFULL DISP R67 4K R2 R3 R4 R5 C4 C5 C6 C7 R68 47K R69 47K R70 47K R71 47K B100% B75% B50% B25% APHONE R68 4K7 R69 4K7 R70 4K7 R71 4K7 B100% B75% B50% B25% APHONE POWER COM LED Display Mode LCD Display Mode LCD PANEL Not Connected (Open) Connected (Closed) LED Display Mode (R67 Connected) (OPTION were C4, C5, C6, C7) LCD Display Mode (R67 Disconnected) (OPTION were R68,R69,R70,R71) C4 (Pin 12) C5 (Pin 11) C6 (Pin 10) C7 (Pin 9) R68 (Pin 12) R69 (Pin 11) R70 (Pin 10) R71 (Pin 9) Indicator Battery Total-Power 1. General Phone-set Total-Power purpose usage. flash while stand-by Charging full-charged N/A Charging 2. For battery in indicator Mode. MOTOROLA indication Mode. stand-by output was series default to support. NiMH battery. mode. Pin 9,10 (APHONE 1. General purpose usage. 2. For MOTOROLA series default to NiMH battery. For MOTOROLA series default to Li-Ion battery. Indicator steady while battery in stand-by mode. (R/G) Battery stand-by indicator output was Pin 10 (R) C.C./C.V. Charging Mode. For MOTOROLA series default to Li-Ion battery. Flash) Phone-set in slot indication only! (APHONE Steady) N/A C.C./C.V. Charging Mode. (C) 1999 Chips Garden Enterprise Co., Ltd. Page 7 of 7

10 ELECTRICAL CHARACTERISTICS ABSOLUTE MAXIMUM RATING : Power Supply Voltage Input Voltage Output Voltage CPU Clock Operating Ambient Temperature Storage Temperature Vcc = to +5.5V Vin = -0.3 to Vcc+0.3V Vout = 0V to Vcc from 1KHz to 6MHz Topr = 0 to 70 Tstr = -20 to 70 DC ELECTRICAL CHARACTERISTICS (25, = 5.0V) Charateristic Condition Symbol Min Typ Max Unit Power Supply Voltage VDD V Output High Voltage VOH 2.4 V Pin 6 ~ 12 Output Low Voltage IOL = 8 ma VOL 0.4 V Pin 4 ~ 12 Output Low Voltage IOL = 25mA 0.5 V Pin 16 Input High Voltage VIH V Pin 4, 6 ~ 13, 16 Input Low Voltage VIL V Pin 4, 6 ~ 13, 16 Positive-Going Input VIH 2 V Threshold Voltage Pin 3 ~ 5, 13 Negative-Going Input Threshold Voltage Pin 3 ~ 5, 13 VIL 0.8 V I/O Port Hi-Z Leakage Pin 4 ~ 12, 16 Input Pull-Down Current Pin 6 ~ 12 Pull-Down Resistor Pin 6 ~ 12 Pull-Up Resistor Pin 13 Pull-Up Resistor Pin 4, 5 Pull-Up Resistor Pin 3, 16 General Current Sink Output Pin 3 ~ 13 High Current Sink Output Pin 16 Pull-Down/Up Non Actived IIL 10 ua Pull-Down IIL 100 ua Actived (Software Programmable) Rpudwn 100 K Schmidt Trigger Input Rpudwn External K Open Drain Output Pull-Up Always Rpullup 5 K (Software Programmable) Rpullup 100 K IOL 8 ma IOL 25 ma Power Consumpation ICC 2 ma Stand-By Current ISTB 5 ua LVR Trigger Voltage VLVR 2.2 V All information may subject to change without notice, Contact us for latest Information!!! August 17, 1999 (C) 1999 Chips Garden Enterprise Co., Ltd. Page 1 of 1

11 Package outline drawings SOP16: plastic small outline package; 16 leads; body width 3.9 mm D E A X c y H E v M A Z 16 9 Q A 2 A 1 (A ) 3 A pin 1 index θ L p 1 8 L e b p w M detail X mm scale DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT mm inches A max A 1 A 2 A 3 b p c D (1) E (1) e H (1) E L L p Q v w y Z Note 1. Plastic or metal protrusions of 0.15 mm maximum per side are not included θ o 8 o